baber/WOPTO huggingface dataset:
Patent GB-986403-A (GB)
Title: Method of forming p-n junctions
IPC: H01L21/205
Filed: 1962-11-19
Abstract: <PICT:0986403/C6-C7/1> A method of forming a PN junction by epitaxial deposition comprises depositing on a semi-conductor substrate of one conductivity type a continuation layer of the same conductivity type semi-conductor and then depositing a layer of opposite conductivity type semi-conductor. In a first example a single crystal silicon substrate heavily doped with antimony is heated to 1250 DEG C. in a reactor and etched with hydrogen at a rate of 10 litres per minute for five to ten minutes. 1.5% by volume of silicon tetrachloride doped with 60 parts per 109 by volume of antimony pentachloride is added to the hydrogen stream for three minutes to deposit an N type continuation layer.  The reactor is flushed with hydrogen and then 1.5% by volume of silicon tetrachloride doped with 100 parts per 106 by volume of boron tribromide is added to the hydrogen for half a minute to deposit a P type layer. In a second example the process of the first example is applied to a boron doped silicon substrate using the doping materials in reverse order, the growth times of the P tye continuation layer and the N type layer being three minutes and ten minutes respectively, a P type emitter being added by normal diffusion methods to form a transistor.  In a third example an antimony doped germanium substrate is heated to 850  DEG C. and hydrogen etched using a flow rate of 3.5 litres per minute. 2% by volume of germanium tetrachloride doped with 0.27 parts per 106 antimony pentachloride is aded to the hydrogen flow to deposit an N aype continuation layer. The reactor is then flushed with hydrogen and the temperature increased to 880  DEG C. and the flow rate to 11.2 litres per minute.  0.6% by volume of germanium tetrachloride doped with 0.4% by volume boron trobromide is then added to the hydrogen stream to deposit a P type layer. An evaporator is described in which the semi-conducor and impurity solutions are vaporized and added to the hydrogen stream.
Patent GB-1195940-A (GB)
Title: Apparatus for Sorting Fertilized and Unfertilized Eggs.
Inventor: BURES JAN
IPC: G01N33/08
Filed: 1968-09-13
Abstract: 1,195,940. Testing eggs, electrically. CESKOSLOVENSKA AKADEMIE VED. Sept. 13, 1968 [Sept. 20, 1967], No.43692/68. Heading G1N. In apparatus for sorting fertilized and unfertilized hens' eggs, making use of electric potentials developed in fertilized eggs, the eggs are inserted at 12 between pairs of electrodes 1, 2 carried on an endless conveyer belt 4 and respective capacitors 7 are charged to the voltages picked up by the electrodes. A switch 6 is opened as each egg reaches the end of the upper flight and remains open while the egg is carried, now turned through 180 degrees, along the lower flight of the conveyer to a measuring device 10 where the switch 6 is again closed and the difference between the voltage on the capacitor 7 and the voltage picked up by the electrodes 1, 2 is measured and used to control a sorting device 11. Thus, the effect of the contact potential is eliminated because this remains unchanged while the embryo potential is reversed by turning the egg over. Hence a fertile egg gives a high output at the device 10 while an unfertile egg gives a low output. The electrodes may be non-polarizable Ag-Ag Cl electrodes mounted on U-shaped insulating supports.
Patent GB-438902-A (GB)
Abstract: 438,902. Ignition timing; circuit interrupters. SOC. ANON. POUR L'EQUIPEMENT ELECTRIQUE DES VEHICULES, 26, Rue Guynemer, Issy-les- Moulineaux, Seine, France. June 2, 1934, No. 16485. Convention date, May 29. [A Specification was laid open to inspection under Sect. 91 of the Acts, Dec. 4,1934.] [Class 7 (iv)] [See also Group XXXVII] The ignition circuit interrupter is carried by a plate supported on ball or similar bearings 65 in the casing. Three equally-spaced bearings are used ; in one case, a larger ball 66k may project through the casing wall and be supported in the loop of a spring 81 attached to the wall. Adjustment for timing is effected by the cable 79 against the action of a spring 74 anchored to the casing and attached to a link 79 on the pivot 76. According to the Specification as open to inspection under Sect. 91, ignition is advanced by centrifugal means proportionally to enginespeed, and retarded according to the increase in charge admitted to the engine, the contact breaker timing lever being either interconnected with the throttle lever, or controlled by engine suction. This subject-matter does not appear in the Specification as accepted.
Patent GB-992832-A (GB)
Title: Improvements in or relating to rotatable tower cranes
IPC: B66C23/66
Filed: 1963-11-07
Abstract: 992,832. Luffing tower cranes. KAPITALVERWALTUNGSGESELLSCHAFT KARL PESCHKE. Nov. 7, 1963 [Nov. 8, 1962], No. 43927/63. Heading B8B. A cable 18, Fig. 1, moves a trolley 5 along the jib 4 of a tower crane and also luffs the jib. The cable passes from the trolley over a pulley 22, Fig. 2, at the tip of the jib, over a guide pulley 31<SP>1</SP>, to a block and tackle 11, 12 and round a winch drum 8. When the cable 18 is wound in the trolley first moves to the outer end of the jib where it is held by a latch 33. Further shortening of the cable luffs the jib upwards. A cable 23, Fig. 1, between pulley blocks 11, 12 determines the lowermost position of the jib. When this position is reached the trolley is released by a cable 19 which extends between the tower and a lever 25 on the latch 33. A spring 20 is included in the cable 19. The trolley moves towards the tower by gravity. A lifting cable 16 extends from the tip of the jib round a pulley 27 on the trolley, round a hook pulley 28 over a pulley 29 on the trolley, guide pulleys 15, 30 on the tower and round a winding drum 7.
Patent GB-940308-A (GB)
Title: Electrical control device
IPC: H01C10/32
Filed: 1961-12-08
Abstract: 940,308. Variable resistors; transformers; inductors. CLAROSTAT MFG. CO. Inc. Dec. 8, 1961 [Dee. 8, 1960], No. 43991/61. Headings HIS and H1T. In a hermetically sealed potentiometer comprising a housing 10 containing a resilient moulding 15 (e.g. of nylon) which supports (indirectly) a collector disc 20 and a resistance coil 21, and a cap 11 having a groove 28 therein which co-operates with a beaded portion 17 of the moulding 15 to provide the aforesaid sealing, a wiper arm 27 is attached to cap 11 whereby rotation of the latter causes arm 27 to sweep disc 20 and coil 21. A wall 14 of the housing supports part of a portion 18 of the moulding, the height of this wall determining the resiliency in a radial direction of portion 18 and hence the amount of torque required to rotate cap 11. The latter is preferably extended (as shown in Fig. 2) so that a portion thereof overlies wall 14. A further resilient moulding 19 is inserted in moulding 15, moulding 19 carrying coil 21 in a peripheral groove 26 and the conducting disc 20 in a central recess thereof. Wiper arm 27 has two contact portions touching disc 20 (Fig. 3, not shown) and one portion contacting coil 21. A stop 30 is provided on cap 11, which stop in combination with another one carried by moulding 19 (Fig. 4, not shown) limits the travel of cap 11. Connecting wires 32 are contained in the bore of threaded housing 10, the bore being filled with a filler compound. An 0-ring 22 may be used when the potentiometer is mounted on a chassis. Specification 887,379 is referred to.
Patent GB-930123-A (GB)
Title: Improvements in or relating to ladders
IPC: E06C1/32
Filed: 1960-12-21
Abstract: 930,123. Ladders. R. W. DAVIES, and M. E. DAVIES. March 19, 1962 [Dec. 21, 1960], No. 44010/60. Class 20 (2). The two parts of a telescopic ladder are each composed of two parts a1, a2, Fig. 1, and b1, b2 joined by sleeves d and a coupling comprising hinged tubes e2, Fig. 3, is provided to connect two parts, e.g. b1, b2 to form a step-ladder. The sleeves d may be connected by rungs d2.
Patent GB-1201057-A (GB)
Title: Combinations of quinoxaline-di-n-oxides and tetracycline antibiotics
IPC: A23K20/195
Filed: 1967-09-27
Abstract: 1,201,057. Quinoxaline di-N-oxides, tetracyclines. CHAS. PFIZER & CO. Inc. 27 Sept., 1967 [1 June, 1967], No. 44078/67. Heading A5B. The chemical reduction of water-soluble quinoxaline-di-N-oxides in aqueous solution by zinc metal is inhibited by coating the surface of the metal with a zinc complex of a tetracycline antibiotic. The-coating may be effected by contacting the zinc metal surface, e.g. galvanized iron troughs and trays with an aqueous solution of a water-soluble tetracycline antibiotic; or with an aqueous solution of a pharmaceutically acceptable, water-soluble salt of a tetracycline antibiotic, at the same time as contacting the surface with the quinoxaline-di-N- oxide in aqueous solution, the molar equivalent ratio range of tetracycline salt: quinoxaline-di- N-oxide, being 0.1-10:1. Many quinoxaline di-N-oxides and tetracyclines are referred to, and preferably the quinoxaline di-N-oxide is 2-methyl-3-hydroxymethyl-, 2,3-dimethyl-, 2- methyl or 2,3-trimethylene-quinoxaline di-N- oxide, 1,2,3,4-tetrahydrophenazine-di-N-oxide or 1,4- di-hydroxy 1,2,3,4-tetrahydrophenazinedi-N-oxide; the tetracycline antibiotic preferably being tetracycline, 5-hydroxy, 7-chloro, 6- dioxy-6-demethyl-6-methylene-5-hydroxy- or α-6-deoxy-5-hydroxytetracyclines or 5-hydroxy -tetracycline hydrochloride. The quinoxaline-di- N-oxides and tetracyclines have antibacterial activity and may be administered together in the drinking water for promotion of growth and treatment of chronic respiratory disease in poultry.
Patent GB-1316060-A (GB)
Title: Servo device with capacitive displacement transducer
IPC: G01B7/06
Filed: 1971-09-22
Abstract: 1316060 Measuring position electrically STAL REFRIGERATION AB 22 Sept 1971 [15 Jan 1971] 44169/71 Heading G1N In a servo-device comprising a piston 2 and a cylinder 1 the piston rod 3 is hollow and a fixed rod electrode 4 is provided co-axial therewith so that the capacitance between the members 3 and 4 varies with the position of the piston 2. These electrodes are connected in a capacitative bridge circuit 5 fed by an oscillator and the output signal is fed to a regular 6. The device may control a valve 8.
Patent GB-1280038-A (GB)
Title: Prefabricated partition walls
Inventor: ANTONINI PIER LUIGI
IPC: E04C2/52
Filed: 1969-09-08
Abstract: 1280038 Prefabricated service wall unit MONTECATINI EDISON SpA 8 Sept 1969 [10 Sept 1968] 44326/69 Heading E1A The height of a prefabricated partition wall comprising an upper section B and a lower section A bearing bathroom fittings, is adjustable by varying the height of the chamber 23 formed between the two sections, which chamber is then concealed by the refitting of a correspondingly dimensioned glass sheet forming part of the diffuser 2 contained by the chamber. The partition shown constitutes one for two adjacent bathrooms, for one bathroom the partition consists of half with reference to line C-C. The sections comprise plastics sandwich panels the ends of which are at least partially closed by profiled plastics strips 13, 21. Each panel has a foamed polyurethane cone which serves, in section A, to fasten in position pipes and cables. The panels of section B are independent from each other. An inspection door 12 for piping is also provided-Fig. 1, and the side edges of the partition are grooved for anchorage to masonry side structures (Fig. 5).
Patent GB-1407430-A (GB)
Title: Sheet feeding and orientating devices in photocopying machines
IPC: G03B27/12
Filed: 1972-09-26
Abstract: 1407430 Feeding sheets OZALID GROUP HOLDINGS Ltd and F A HILL 20 Sept 1973 [26 Sept 1972] 44337/72 Heading B8R To ensure correct orientation of an original document being fed into a copying machine on belts 30 a series of sensors 36a, 36b and 36c is arranged transverse the feed path, each sensor being associated with a solenoid operated braking device 38a, 38b and 38c respectively. Thus detection of the leading edge of a sheet by sensor Ml and not sensor M2 causes braking device 38a to be lowered by solenoid S1 to skew the sheet round until its leading edge strikes sensor 36b whereupon the solenoid S1 is deenergized. A further sensor 40 disables all the braking devices if a sheet wide enough to engage this further sensor is fed. The above apparatus is incorporated in a copying machine along the path of recirculation of an original from a copy drum 24 to an inlet 32. The recirculated original is registered with a further copy sheet (severed from roll 18 by guillotine 21) at feed roller 23.
Patent GB-1530916-A (GB)
Title: Mass flow rate meter for a gaseous medium
IPC: G01F1/40
Filed: 1975-10-28
Abstract: 1530916 Measuring mass flow-rate electrically PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 28 Oct 1975 [6 Nov 1974]  44362/75 Heading G1N The mass flow-rate of a gas through a conduit is determined by passing the gas through a constriction shaped to ensure that the flow is laminar, and measuring the upstream and downstream pressures and the temperature of the gas, from which the mass flow-rate is calculated. As shown, Fig. 1a, the gas is fed through a constriction 4 comprising a plurality of coaxial circular cylinders spaced by corrugated strips 4b, Fig. 1b, supported by a central copper body 7 carrying two diaphragms 8, 9 consisting of silicon with resistance elements in a surface formed by boron diffusion. Diaphragm 8 is subjected on one face to the low pressure of an evacuated space 14 and on the other face to the upstream gas pressure P via space 15 and ducts 16, 17: diaphragm 9 is subjected on one face to the upstream pressure P and on the other face to the downstream pressure P-#P via space 18 and duct 20. Both diaphragms and their resistance elements are at the gas temperature T. The resistors on diaphragm 8 are connected in a first bridge circuit A Fig. 2, whose output is proportional to P/T and is the energizing voltage for a second bridge circuit B formed by the resistors on diaphragm 9, whose output is proportional to P/T x #P/T. It is shown that this is proportional to the mass flow-rate of the gas.
Patent GB-926810-A (GB)
Title: Purification of 2, 6-toluenediamine
Filed: 1961-12-12
Abstract: Pure 2,6-toluenediamine is made by acetylating a mixture of 2,4- and 2,6-toluenediamines to a mixture of the corresponding diacetamidotoluenes, separating the 2,6-diacetamidotoluene from the latter mixture by crystallisation from an organic solvent and hydrolyzing the same to recover pure 2,6-toluenediamine.  The mixed toluenediamines, in the form of 80-20% or 65-35% mixtures of the 2,4 and 2,6 isomers, may be dissolved in an inert solvent-diluent and acetylated with acetic anhydride.  The diacetylated product is then recrystallized from an organic solvent, such as a carboxylic acid, ester, ketone or alcohol, to separate the less soluble 2,6-isomer from the more soluble 2,4-isomer.  Preferably acetic acid is used as the acetylation solvent and the 2,6-isomer crystallises out on cooling, thus combining the acetylation and crystallisation steps. The 2,6-diacetamidotoluene is hydrolyzed either with strong alkali such as sodium or potassium hydroxide or with strong acid such as sulphuric or hydrochloric acid.
Patent GB-1479616-A (GB)
Title: Train position indication
IPC: G01S13/75
Filed: 1974-10-15
Abstract: 1479616 Interrogator - responder system STANDARD TELEPHONES & CABLES Ltd 7 Oct 1975 [15 Oct 1974] 44566/74 Heading H4D A vehicle position indicating system including a pulse radar transmitter/receiver and a plurality of passive transponders each of which has an antenna coupled to a reflective delay line. The radar and transponders may be mounted respectively, for example, on a train and railway track on which the train is moving. Different transponders have different delays, so that passage of the radar past the transponder causes the transmitted radar pulses to be reflected and received at the radar after a time determined by the transponder delay, the radar receiver having a plurality of range gates whereby the received pulses may be classified into time intervals corresponding to the different transponder delays. In Fig. 1 timing circuit 6 actuates a modulator 7 every 48 Ás to produce a 3 Ás pulse at 3 GHz from oscillator 8 through isolator 10, T/R circulator 11, and antenna 5 in the direction of track 2 whereon, at predetermined intervals, e.g. 100 m., are mounted transponders comprising printed circuit antennae 3 connected to delay lines 4. Timing circuit 6, after 3 Ás to allow train ground reflections to subside, closes RX switch 9 whereupon a reflected signal from the transponder having a coded delay length is received via mixer 12, 100 MHz I.F. stage 14, detector 15 and applied to a series of range gates 16a ... 16n which are opened at predetermined times by timing circuit 6. The outputs from the range gates are fed to computer 17 which can also receive wheel revolution pulses from an axle mounted transducer whereby the distance travelled can be measured at any given moment to within 1 metre from the last transponder over which the train has passed. A transponder coupled to two or more different delays which give a unique response every 1À8 or 18 km. may be provided to supply more information for fixing the train position. It is stated that the radar may be stationary and the transducers mounted on, e.g. road vehicles.
Patent GB-1527304-A (GB)
Title: Composition and method for dispersing high molecular weight flocculant polymers in water
IPC: C02F1/52
Filed: 1976-10-27
Abstract: 1527304 Flocculating compositions CHEMED CORP 27 Oct 1976 [11 Nov 1975] 44650/76 Heading C3V [Also in Division C1] Compositions which can be dissolved in water to give a feed liquid for water treatment (e.g. of industrial or waste water) comprise discrete particles, each of which comprises an aggregate of sub-particles of a flocculating polymer, subparticles of a solid diluent which aids in reducing agglomeration of the polymer sub-particles in water by physically separating them, and 0À1-20% (by weight of the polymer) of absorbed water. The polymer may be an acrylamide polymer, polystyrene sulphonate or polyethylene oxide, and the solid diluent may be sodium chloride, sulphate, sulphite, bisulphate or hydrosulphite, soda ash or magnesium sulphate.
Patent GB-1430976-A (GB)
Title: Ring spinning machine
IPC: D01H11/00
Filed: 1973-09-24
Abstract: 1430976 Ring spinning machine EDERA SpA OFFICINA MECCANICA TESSILE 24 Sept 1973 [29 Sept 1972] 44748/73 Headings DID and D1F A ring spinning machine has two spaced rows of spindles mounted in back to back relationship on a frame which carries respective cylinder sets overlying the rows, each spindle comprising three movable bars or rails supporting rings, anti-ballooning containers and thread guides respectively, in which machine the bars or rails of one row are not directly connected to the bars or rails of the other row so that the space between the spindle rows is free from vertically reciprocating bars or rail cross ties. The upper portion of the space between the spindle rows accommodates an air blowing or suction manifold supported by the frame for grasping broken threads, the lower portion of such space accommodates an air blowing or suction device 32, supported by the frame for cleaning the spindle rows, and the space between the cylinder sets accommodating an air blowing or suction device supported by the frame above said manifold for cleaning the cylinder sets. The cleaning devices can each comprise a fixed channel 33, 21, 31, extending lengthwise of the rows, the channel being connected to an air blowing or suction system and being equipped with air outlet or air inlet nozzles. The cleaning devices may move lengthwise of the rows and contain an air blowing or suction unit and be equipped with air blowing or suction nozzles. The cleaning devices can be moved by an endless chain via variable speed reduction gearing.
Patent GB-1004359-A (GB)
Title: An electric switch
Inventor: MAMIYA SHIGEO
IPC: H01H13/46
Filed: 1961-12-15
Abstract: 1,004,359. Press-button retractive switches. SAGINOMIYA SEISAKUSHO CO., Ltd. Dec. 15, 1961, No. 44978/61. Heading H2B. A changeover contact snap-action switch has a switch-operating rod 2 fastened to a central operating plate a of a contact switching plate 4, the rod 2 being surrounded by a helical biasing spring 17 and moving in a fixed guide 11 on which rests a saucer 13 of insulating material supporting an auxiliary helical spring 12, adjustable by a bolt 14 so that the operating pressure is adjustable. When pressure is exerted on a push-button 1 the operating rod 2 pushes plate a against spring 17 until the deadcentre position of a snap-action spring 7 is neared. The tip of rod 2 then engages the saucer 13 and pushes against the auxiliary spring 12 as well as spring 17 until a movable contact 6 is snapped over between fixed contacts 10, 10a by snap-action spring 7. When retracting, spring 12 assists the switching movement only until saucer 13 engages guide 11, when contact 6 is later snapped over between contacts 10a, 10, under the constant pressure of the biasing spring 17 only.
Patent GB-1242905-A (GB)
Title: Process for transparent dyeing of polyesters by means of pigments soluble in the mass
IPC: C09B5/62
Filed: 1968-09-23
Abstract: 1,242,905. Dyeing polyesters. FARBWERKE HOECHST A.G. 23 Sept., 1968 [21 Sept., 1967], No. 45008/68. Heading C3R. Polyesters are coloured prior to the final moulding with a dyestuff pigment that contains at least one grouping of the formula or in which R 1  represents H or an optionally substituted alkyl or aryl group and R2 represents an optionally substituted alkyl or aryl group. Especially suitable are pigments containing these groupings in an optionally substituted phthalocyanine-metal compound, in an anthraquinoid or indigoid vat dyestuff, in a naphthalene- or perylene-tetracarboxylic acid, dioxazine or quinacridone dyestuff, in a metalliferous monoazo pigment or in a metal-free diazo pigment. Polyesters mentioned are polyethylene terephthalate and poly(1,4-dimethylolcyclohexaneterephthalate), and in the examples the dyestuffs used were copper-thalocyanino trisulphonic acid anilide, tetraphenylcopper-phthalocyanine trisulphonic acid anilide and chlorinated-copper-phthalocyanine trisulphonic acid anilide.
Patent GB-1406720-A (GB)
Title: Apparatus and method for reducing muliplicative gain variation  distortions
IPC: G11B20/10
Filed: 1972-09-29
Abstract: 1406720 Gain control arrangement SPERRY RAND CORP 29 Sept 1972 [29 Oct 1971] 45025/72 Heading H4R In a data transmission system for either analogue or mutli-level digital transmission the incoming data from store 26, Fig. 2, is fed through a device 30 which provides a power function of the input signal, e.g. #<SP>x</SP> where # is a constant and x the input signal, for transmission. At the receiver, Fig. 3, the received signals are fed through a device 43 providing a logarithmic function, which restores the data to its original form and reduces any multiplicative distortion provided by the transmission system to additive distortion, having a smaller effect. Preferably the signals, before conversion to power functions, are added in modulo fashion in accumulator 29, and at the receiver differences are taken between successive signals in subtractor 47, also in modulo fashion, so that slowly varying multiplicative distortion, e.g. gain changes, have little or no effect on the output accuracy. An alternative arrangement, Fig. 9 (not shown), converts the input signals to power functions (in 126) and multiplies successive signal sample functions together (at 127) and/or at the receiver Fig. 11 (not shown) the input signals have the ratios between successive samples taken (at 151) before determining the log of the ratios (at 156). The arrangement is a mathematical equivalent of the first system with the order of the components reversed.